lkml.org 
[lkml]   [2021]   [Mar]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2] MIPS/bpf: Enable bpf_probe_read{, str}() on MIPS again
From
Date
On 03/22/2021 12:46 PM, Maciej W. Rozycki wrote:
> On Thu, 18 Mar 2021, Tiezhu Yang wrote:
>
>> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
>> index 160b3a8..4b94ec7 100644
>> --- a/arch/mips/Kconfig
>> +++ b/arch/mips/Kconfig
>> @@ -6,6 +6,7 @@ config MIPS
>> select ARCH_BINFMT_ELF_STATE if MIPS_FP_SUPPORT
>> select ARCH_HAS_FORTIFY_SOURCE
>> select ARCH_HAS_KCOV
>> + select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
> Hmm, documentation on ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE seems rather
> scarce, but based on my guess shouldn't this be "if !EVA"?
>
> Maciej

I do not quite know what the effect if MIPS EVA (Enhanced Virtual
Addressing)
is set, I saw that ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE should be
restricted
to archs with non-overlapping address ranges.

I wonder whether MIPS EVA will generate overlapping address ranges?
If yes, it is better to make ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE depend
on !EVA on MIPS.

Thanks,
Tiezhu

\
 
 \ /
  Last update: 2021-03-22 08:15    [W:0.082 / U:0.604 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site